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CVE-2021-40441

26
FAUCET Score

CVE-2021-40441 is a Windows Media Center Elevation of Privilege vulnerability affecting various versions of Windows 7, 8.1, and Server 2008/2012. With a CVSS score of 7.8 (High), it allows a local, low-privileged attacker to gain high privileges on the system without user interaction. While the vulnerability has a high potential for impact (confidentiality, integrity, and availability), there is no public exploit code available, nor is it listed on the CISA KEV catalog. Community discussion and media coverage are minimal, suggesting low active exploitation or widespread awareness.

Impacted Technologies

VendorProductVersion(s)CPE
sp1CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_7:sp1:*:*:*:*:*:x64:*
sp1CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_7:sp1:*:*:*:*:*:x86:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:-:*:-:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
r2CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 86th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (14)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows 7 for 32-bit Systems Service Pack 1Fixed in: 6.1.7601.25796
View patch
microsoftpatch availablevia msrc
Product: Windows 7 for x64-based Systems Service Pack 1Fixed in: 6.1.7601.25796
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1Fixed in: 6.1.7601.25796
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Fixed in: 6.1.7601.25796
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for 32-bit systemsFixed in: 6.3.9600.20207
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for x64-based systemsFixed in: 6.3.9600.20207
View patch
microsoftpatch availablevia msrc
Product: Windows RT 8.1Fixed in: 6.3.9600.20207
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2Fixed in: 6.3.9600.20207
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2 (Server Core installation)Fixed in: 6.3.9600.20207
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012Fixed in: 6.2.9200.23545
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 (Server Core installation)Fixed in: 6.2.9200.23545
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012Fixed in: 6.2.9200.23540
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 (Server Core installation)Fixed in: 6.2.9200.23540
View patch

Vendor Advisories (1)

microsoft2021-Dec/CVE-2021-40441Important

Windows Media Center Elevation of Privilege Vulnerability

Dec 14, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-40441
PatchVendor Advisory